Fix Audacity No Sound On Linux

  Install pipewire:

sudo apt update
sudo apt install pipewire pipewire-pulse wireplumber

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  Enable pipewire:

systemctl --user --now enable pipewire pipewire-pulse wireplumber

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  Reboot Computer:

sudo reboot

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  See the Audio server:

pactl info | grep "Server Name"

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Server Name: PulseAudio (on PipeWire 1.4.2)
Correct